著者

Masaya Iwamuro Takehiro Tanaka Sakiko Kuraoka Kenta Hamada Makoto Abe Yoshiyasu Kono Hiromitsu Kanzaki Seiji Kawano Yoshiro Kawahara Hiroyuki Okada

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.61, no.13, pp.1931-1938, 2022-07-01 (Released:2022-07-01)

参考文献数

16

被引用文献数

4

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Objective This study aimed to determine the prevalence and endoscopic features of zinc acetate dihydrate tablet-associated gastric lesions. Methods We retrospectively examined the endoscopic features of 47 patients taking zinc acetate dihydrate tablets who underwent esophagogastroduodenoscopy. Results Gastric mucosal alterations, including redness, erosions, ulcers, and adhesion of the white coat, were observed in 29 of 47 patients (61.7%). Among patients with gastric lesions (group A), there was a significantly higher percentage of symptomatic patients in comparison to patients without lesions (group B) (65.5% vs. 22.2%; p<0.01). The background characteristics of the two groups did not differ to a statistically significant extent. On esophagogastroduodenoscopy, mucosal redness (n=27, 93.1%), erosions (n=26, 90.0%), adhesion of the white coat (n=25, 86.2%), and ulcers (n=9, 31.0%) were observed. None of the 19 patients who previously underwent esophagogastroduodenoscopy had gastric lesions before starting zinc acetate dihydrate. Esophagogastroduodenoscopy was performed after the cessation of zinc acetate dihydrate intake in six patients, and revealed the resolution of gastric lesions. Conclusion Gastric lesions were observed in 29 of 47 patients who were taking zinc acetate dihydrate tablets. The most common endoscopic findings were mucosal redness (93.1%), erosions (90.0%), adhesion of the white coat (86.2%), and ulcers (31.0%). Although the exact pathogenesis is uncertain, we believe that understanding the unique manifestations of this gastric lesion will help physicians manage adverse events in patients taking zinc acetate dihydrate tablets.

著者

Yuki Baba Seiji Kawano Yoshiyasu Kono Toshihiro Inokuchi Hiromitsu Kanzaki Masaya Iwamuro Keita Harada Sakiko Hiraoka Yoshiro Kawahara Hiroyuki Okada

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.3628-19, (Released:2020-02-05)

参考文献数

16

被引用文献数

12

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Objective With the advent of capsule endoscopy (CE) and double-balloon endoscopy (DBE), the diagnosis and treatment of obscure gastrointestinal bleeding (OGIB) have markedly progressed. However, rebleeding sometimes occurs and is difficult to diagnose and treat. The aim of the present study was to investigate the clinical features of OGIB and risk factors for rebleeding in our hospital. Methods A total of 195 patients who underwent CE and/or DBE for OGIB in our hospital from January 2009 to July 2016 were included in the present study. We analyzed 168 cases of small intestinal OGIB, after excluding 27 cases of extra small intestinal bleeding. The clinical characteristics and risk factors related to rebleeding were retrospectively studied. Results Among the 168 patients who were included in the analysis, 95 patients (56.5%) were male. The mean age was 64.5 years (range, 8 to 87 years). Hypertension (31.0%) was the most frequent comorbidity, followed by chronic kidney disease (19.0%). The final diagnoses were ulcerative lesions (n=50, 29.8%), vascular lesions (n=30, 17.9%), tumors (n=7, 4.2%), and diverticula (n=2, 1.2%). The bleeding source was undetermined in the remaining 79 cases (47.0%). Rebleeding was confirmed in 29 cases (17.3%). In a univariate analysis, chronic kidney disease, vascular lesions, and overt previous bleeding were significantly associated with the risk of rebleeding. A multivariate analysis showed that chronic kidney disease, vascular lesion, and overt previous bleeding were significantly associated with the risk of rebleeding. Conclusion Patients with OGIB with overt previous bleeding, vascular lesions, and/or chronic kidney disease had a higher risk of rebleeding.

著者

Hiroya Gotouda Ikuo Nasu Tetsuro Kono Yukari Ootani Takeshi Kanno Ryo Tamamura Takao Kuwada-Kusunose Kunihiro Suzuki Tomohiko Hirayama Tatsuya Hirayama Toshiro Sakae Hiroyuki Okada

出版者

硬組織再生生物学会

雑誌

Journal of Hard Tissue Biology (ISSN:13417649)

巻号頁・発行日

vol.26, no.1, pp.81-86, 2017 (Released:2017-01-06)

参考文献数

20

被引用文献数

5

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The aim of this study was to show the reaction varieties of human tooth enamel and dentin with a carbonated soft drink, Sprite. After one week exposing into the soft drink, the sliced tooth specimens were examined by macroscopic and microscopic and then carried out the micro X-ray diffraction analysis using a 100 μm diameter X-ray beam. The macroscopic and microscopic results showed the wide varieties from the one showing a very slight increase white-spot areas in the enamel to the another showing almost complete decay of the enamel. The crystallites in the examined enamel and dentin changed drastically as follows; the one enamel sample showed the decrease of crystal amount and some ionic substitutions, and the another dentin sample showed the increase in crystallinity and ionic substitutions. These results clearly showed that the original tooth enamel and dentin had their own crystallographic properties differing from each others. This study provided a crystallographic basic data which will be applied to a tayler-made individual preventive dentistry in near future.

著者

Tetsuro Kono Arata Watanabe Takeshi Kanno Yukari Ootani Ryo Tamamura Toshiro Sakae Hiroyuki Okada

出版者

THE SOCIETY FOR HARD TISSUE REGENERATIVE BIOLOGY

雑誌

Journal of Hard Tissue Biology (ISSN:13417649)

巻号頁・発行日

vol.28, no.2, pp.129-138, 2019 (Released:2019-04-24)

参考文献数

44

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To elucidate the crystallo-chemical reaction between the enamel and carbonated soft drink, a micro-X-ray diffraction analysis (micro-XRD) was conducted using the human tooth sections soaked in the drink (Sprite®) for 1 and 7 days. In this study, 4 typically and heavily dissolved teeth were selected from 20 teeth, and the divergence of the crystallographic properties of the enamel was analyzed.All of the untreated human tooth enamels exhibited only the apatitic XRD patterns. We confirmed that the carbonated soft drink changed the macro- and microscopic morphological features of individual tooth enamel. The following 4 results were obtained from our study: i) the unit cell dimensions and crystallinity of the untreated enamel apatite varied between the layers and the individual teeth; ii) after the soaking experiment, the crystallographic properties of the enamels changed remarkably and displayed non-uniformity; iii) no relationship was discerned between the enamel’s crystallographic properties and the sensitivity of the carious attack; and iv) the intermediate reaction product of soaking was uncovered; however, it was not identified at this time. The presence or absence of occurrence and variations in the amount of intermediate product reflected the complex chemical and crystallo-chemical reactions between the decalcification solution and the human tooth enamel crystallites.We clearly established that the untreated human tooth enamels differed in their crystallographic properties and did not react in the same manner, which resulted in varied apatitic structures after soaking. These results necessitate reconsideration of the generally accepted caries protection methods that are applied as common standards for all individuals and tooth enamels.

著者

Hiroyuki OKADA Kohtaro MIYAZAWA Shigeo FUKUDA Yoshifumi IWAMARU Morikazu IMAMURA Kentaro MASUJIN Yuichi MATSUURA Takashi FUJII Kei FUJII Soichi KAGEYAMA Miyako YOSHIOKA Yuichi MURAYAMA Takashi YOKOYAMA

出版者

公益社団法人 日本獣医学会

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.13-0363, (Released:2013-08-27)

被引用文献数

3 9

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The aim of this study was to investigate the presence of disease-associated prion protein (PrPSc) in the skeletal muscle of cattle infected with classical bovine spongiform encephalopathy (C-BSE). The study was carried out systematically in 12 different muscle samples from 43 (3 field and 40 experimental) cases of C-BSE; however, muscle spindles were not available in many of these cases. Therefore, analysis became restricted to a total of 31 muscles in 23 cattle. Even after this restriction, low levels of PrPSc were detected in the muscle spindles of the masseter, intercostal, triceps brachii, psoas major, quadriceps femoris and semitendinosus muscles from 3 field and 6 experimental clinical-stage cases. The present data indicate that small amounts of PrPSc are detectable by immunohistochemistry in the skeletal muscles of animals terminally affected with C-BSE.

著者

Emi Tanaka Naohiro Oda Sayo Kobayashi Tsuneyoshi Ogawa Reo Mitani Toru Nawa Ichiro Takata Toru Ueki Hiroyuki Okada

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.8214-21, (Released:2021-09-11)

参考文献数

13

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An 80-year-old man underwent follow-up examinations after endoscopic submucosal dissection (ESD) for esophageal cancer. Computed tomography (CT) showed enlarged lymph nodes of the right recurrent nerve. The patient had esophageal stenosis due to repeated ESD for multiple esophageal tumors. The stenosis made the passage of an endoscopic ultrasound (EUS) scope through the esophagus difficult. Thus, an endobronchial ultrasound bronchoscope, which had a thinner diameter than that of the EUS scope, was used for transesophageal endoscopic ultrasound with bronchoscope-guided fine-needle aspiration. This technique led to the diagnosis of mediastinal lymph node metastasis of esophageal cancer.

著者

高橋 英之 岡田 浩之 大森 隆司 金岡 利知 渡辺 一郎 Hideyuki Takahashi Hiroyuki Okada Takashi Omori Toshikazu Kanaoka Ichiro Watanabe

雑誌

人工知能学会誌 = Journal of Japanese Society for Artificial Intelligence (ISSN:09128085)

巻号頁・発行日

vol.28, no.2, pp.264-271, 2013-03-01